client::page_service: fails to parse Error tag

[problame]

2024-01-08T17:31:51.614277Z  INFO number of timelines:
200
2024-01-08T17:31:53.906346Z  INFO RPS: 707
2024-01-08T17:31:54.907109Z  INFO RPS: 11055
2024-01-08T17:31:55.908896Z  INFO RPS: 17344
2024-01-08T17:31:56.909262Z  INFO RPS: 23668
thread 'tokio-runtime-worker' panicked at pageserver/pagebench/src/cmd/getpage_latest_lsn.rs:342:14:
called `Result::unwrap()` on an `Err` value: getpage for a1815f4d2223f3c0cc0a6ef65aafdb47/0bed65b1d81dc8456b3b24bade5939bc

Caused by:
    remaining bytes in msg with tag=103: 36

Stack backtrace:
   0: pageserver_api::models::PagestreamBeMessage::deserialize
             at ./libs/pageserver_api/src/models.rs:832:13
   1: pageserver_client::page_service::PagestreamClient::getpage::{{closure}}
             at ./pageserver/client/src/page_service.rs:130:19
      pagebench::cmd::getpage_latest_lsn::client::{{closure}}::{{closure}}
             at ./pageserver/pagebench/src/cmd/getpage_latest_lsn.rs:340:14
      <tracing::instrument::Instrumented<T> as core::future::future::Future>::poll
             at /home/admin/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-0.1.37/src/instrument.rs:272:9
   2: pagebench::cmd::getpage_latest_lsn::client::{{closure}}
             at ./pageserver/pagebench/src/cmd/getpage_latest_lsn.rs:317:1

Corresponding PS log (kind of error shouldn't really matter, I think)

2024-01-08T17:31:56.988380Z  INFO page_service_conn_main{peer_addr=127.0.0.1:46556}:process_query{tenant_id=a1815f4d2223f3c0cc0a6ef65aafdb47 timeline_id=0bed65b1d81dc8456b3b24bade5939bc}:handle_pagerequests:handle_get_page_at_lsn_request{rel=1663/5/2608 blkno=3 req_lsn=0/1504210}: walredo failed, path:
- layer traversal: result Continue, cont_lsn 0/1504199, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__0000000001504199-0000000001504211
- layer traversal: result Continue, cont_lsn 0/1504121, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__0000000001504121-0000000001504199
- layer traversal: result Continue, cont_lsn 0/15040A9, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__00000000015040A9-0000000001504121
- layer traversal: result Continue, cont_lsn 0/1504031, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__0000000001504031-00000000015040A9
- layer traversal: result Continue, cont_lsn 0/1503FA1, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__0000000001503FA1-0000000001504031
- layer traversal: result Continue, cont_lsn 0/1503F29, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__0000000001503F29-0000000001503FA1
- layer traversal: result Continue, cont_lsn 0/1503EB1, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__0000000001503EB1-0000000001503F29
- layer traversal: result Complete, cont_lsn 0/14DC061, layer: /mnt/test_output/test_getpage_throughput/repo/pageserver_1/tenants/a1815f4d2223f3c0cc0a6ef65aafdb47/timelines/0bed65b1d81dc8456b3b24bade5939bc/000000000000000000000000000000000000-FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF__00000000014DC061-0000000001503EB1

2024-01-08T17:31:56.988488Z ERROR page_service_conn_main{peer_addr=127.0.0.1:46556}:process_query{tenant_id=a1815f4d2223f3c0cc0a6ef65aafdb47 timeline_id=0bed65b1d81dc8456b3b24bade5939bc}:handle_pagerequests:handle_get_page_at_lsn_request{rel=1663/5/2608 blkno=3 req_lsn=0/1504210}: error reading relation or page version: Failed to reconstruct a page image:: launch walredo process: spawn process: Too many open files (os error 24)